Ohms Law Formula Sheet

Basic electrical terms and defintions.

Ohms law formula sheet. Measured in ohms is represented by r or the greek letter ω power. This ohm s law triangle graphic is also helpful to learn the formulas. When current and resistance are given use v ir to calculate voltage. Ohm s law and power law formula series circuits in series circuit the voltage is divide between all the resistors.

Introducing the constant of proportionality the resistance one arrives at the usual mathematical equation that describes this relationship. V i r. You ll have to insert the x between the i and r in the graphic and imagine the horizontal divide line but the principal is just the same. Just cover the unknown value and follow the graphic as in the yellow wheel examples above.

The formula can be manipulated so that if any two quantities are known the third can be calculated. Where i is the current through the conductor in units of amperes v is the voltage measured across the conductor in. By lumping ohm s law with joules law one can easily achieve the formula for power. To use it simply choose the quadrant corresponding to the variable you want to calculate then select the segment corresponding to the variables that you know the values of.

Just enter 2 known values and the calculator will solve for the others. Ohm s law formula helps to calculate voltage current and resistance. Calculate power current voltage or resistance. Ohm s law can be expressed in a mathematical form.

The ohm s law formula or equation is very straightforward. Ohm s law states the relationship between voltage current and resistance. This table will be useful to solve problems and to understand examples. The wheel below is a handy tool and memory jogger.

Measured in watts is represented by the letter w. E or v voltage volts i current amps r resistance ohms so if you need to find voltage current or resistance simply place your finger over what you re trying to find and the formula wheel will do the rest. With just a handful of basic mathematical formulas you can get pretty far in analyzing the goings on in electronic circuits and in choosing values for electronic components in circuits you design. Let s take a look at formulas.

Simple to use ohm s law calculator. Ohm s law and joule s law. Ohm s law and joule s law are commonly used in calculations dealing with electronic circuits. You can find below a table with every formula for the power law and ohm s law.

In the formula wheel you ll see three letters each one represent a value. Ohm s law states that the current through a conductor between two points is directly proportional to the voltage across the two points. Because of the ohm s law formula wheel.